Hey Heinz, I'd like to point out that Ev's are different in little cup, and sometimes pokemon can max out a stat without using all 252 Ev's in it.
To easily fix this, as I see you export from PO, Just check the Ev's from level 5 and check down by 4's from 252, Or just say what stats,
Example: EV's: HP / Atk / SDef